Trend analysis is the process of identifying major and minor trends in ad consumption and response behavior. Adaptive trend based optimization analyzes the ad response stream in real time and adapts the ad delivery to respond to identified trends and patterns, helping to optimize ad spend and ROI. Key elements include accurately detecting patterns, predicting patterns early based on past trend data, identifying parameters defining trends, and adapting ad delivery in real time to respond to trends. Tools and techniques from other domains like technical indicators, Fibonacci sequences, and Elliott wave theory from stock markets can inform trend analysis approaches.